Sign problem in two-color two-flavor QCD with quark and isospin chemical potentials
Sign problem in two-color two-flavor QCD with quark and isospin chemical potentials
We revisit two-color two-flavor Quantum Chromodynamics (QCD) which suffers from the sign problem of the Dirac determinant at finite baryon or quark density if a finite isospin chemical potential breaks two-flavor degeneracy.We discuss the eigenvalue distribution of the single-flavor Dirac operator to find the quartet structure, i.e. if λ + …